<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title>
    <style type="text/css">
body,html{
	padding: 100px;
}
div{width: 100px;height: 100px;background: black;position: absolute;left: 0;top: 0;}

    </style> 
</head>
<body>
<div></div>
</body>
</html>